Automatic reversing-switch



H. K. SANDELL.

AUTOMATIC REVERSING SWITCH.

APPLICATXON FILED SEPT. 12. 1916.

1,305,01 3. Patented May 27, 1919.

2 SHEETS-SHEET I.

H. K. SANDELL.

AUTOMATIC REVERSING SWITCH.

APPLICATION Fl-LED SEPT. 12. 191 6.

Patented May 27, 1919.

2 SHEETSSHEET 2.

gy fzjmiei vice.

UNITED STATES PATENT OFFICE.

HENRY x. sANnELL, OF CHICAGO, ILLINOIS, ASSIGNOR T0 HERBERT s. MILLS, or

- CHICAGO, ILLINOIS.

AUTOMATIC REVEBSINGSWITCH.

To all whom it'may concern:

Be it known that I, HENRY K. SANDELL, a citizen of the'United States, residing at Chicago, in the county of Cook and State Improvement in Automatic Reversing- Switches, of which the following is a specification.

designed for use in connection with musicsheet feeders, to accomplish the automatic reversal of the driving motor of such a de- The invention will be fully understood from the following detailed description of a specific embodiment thereof, taken in connection with the accompanying drawings, in

which Figure 1 is a plan View of my improved switch; Fig. 2 is a side elevation thereof with two of the brushes removed to the right of the line 2 in Fig. 1; Fig. 3 is a section on the line 3 of Fig. 1; Fig. 4 is a section on the line 4 of Fig. 1, and Fig. 5 is a diagrammatic view showing the electrical connections of the switch as the latter is applied to the control of the music-sheet drivment.

Referring more particularly to the mechanical construction of the device as illustrated in Figs. 1 to 4, there is shown a baseplate 12 carrying a pair of alined solenoid coils 6 and 7 through which passes a solenoid core 8 mounted upon the non-magnetic conductor rod 9 which extends from end to end and through the bores of the two sole- I That end of the rod 9 which projects beyond the coil carries a switch-bar 14 of rectangular cross-section and having an insulating' block 15 let into a notch orv recess extending inwardly from its upper face. In the center of the block 15 there is mounted a conductor button 16 from which a conductor pin 17 extends upwardly to travel Specification of Letters late'nt.

Original application filed December 22, 1914, Serial No. 877,846. Divided and this application filed September 12, 1916. Serial No. 119,657.

18 mounted on the base 12. To insure electrical connections between the pin 17 and the bracket 18, a flexible conductor 19 may be employed. of Illinois, have invented a new and useful On either face of the switch-bar 14 the base 12 carries a brush-supporting bracket 20, the two brackets being offset from one another longitudinally of the switch, as shown in Fig. 1. Each of the brackets 20 carries two brush holders in which are mounted spring-held brushes designated 21, 22, 2 3 and 24. The mechanical construction is completed by a handle 25 which may be attached to the outer end ofthe rod 9 beyond the switch-bar 14.

In Fig. 5, I have illustrated my automatic reversing switch forming a part of the motor control of a music-sheet feeding-motor of the type shown and described in my copending application, Serial No.

877,846, filed December 22, 1914, of which application the present application is a division.

The electrical connections comprise the llne-circuitwires 30 and 31, the motor designatedas' a whole by 32, and the contact devices. lnterposed between these elements. In

the particular example chosen, the contact devices comprise ametallic cylinder 33 in operative relation with which there are aring-motor in a mechanical musical instruranged brushes 34 which contact with the cylinder under certain predetermined conditions, as for example, through the perforations of a music-roll or music-sheet.

A secondcontact device 1s shown as an arm 35 carrying a pivoted contact finger 36 which, upon a certain predetermined motion of the arm, is designed to snap off of an abutment 37 to engage a contact screw 38.

The line-wire 30 is connected to the sole noid or plunger rod 9, while the line-wire 31 is grounded to the roller 33, and beyond the latter is connected to one brush of the motor 32, the other brush of the motor being connected with the bracket 18 and through the latter with the contact button 16 of the switch-bar. The two contact devices through which the operation of the reverse switch and by the latter the direction'of rotation of the motor is controlled, are each interposed in shunt circuits, the contact 36, 38 being interposed in a shunt 39 extending between the line-wire 31 and the brush 23 and including the solenoid coil while the contact 33, 34, is interposed in a shunt 40 extending between the line-wire 3land the brush 22 and 3 including the solenoid coil 7. The fields of the motor 32 which, as will 5 later appear, are illustratedas seriesiields,

are interposed between the'brushes'2l, 24.

V Assum ing that the motor is turning and th'eline-circuitlisclosed, the shunt eircuit40 be ng Ope haves-. h b u h L3 enn ste therewitliand thearni33,it will b see that the motor will receive currentrthrough the in 31, h av conta v' ri 2 thence through .tllerfields ,to the ,brush 24 and hrough the contact of the latter with the switch-bar 14 to the line-wire} Adiis h 1 conta t 436, 1 .a i1 en a met, the un :iv b wh n e y ease i of th ifaetyth th brus11;.,23 wh h {f rm 9 te mi a thereof} re t new the in ulats b i 5 5 t having b n s em t a -.th enta ie heshi tAflm np ie 3 34,g it ,w'n therefore be seen that neither; of the? lsoleno dfcoilsfi nor 7 will he energiz ed. es flins li t tsem ii du in zth 01 2 5 ation lo frthe, motor} inQthe;direction and under the conditions lastv described, ,an d-- before {it des ignedto ,haye the. n iotor reversed, the

Shunt T39 is opened between the cchntactsiiifi,

as; 'Itiv llqbfe noted thatgthis opening of, the

30 ,shluitfi a fi Pe men ih dvi1 harem fi 11 29 .1 s t m h shim i eins t e eylopena 2 1* i i i eior immat rial ,atiwhatltiin ethe carmlfih be actuated, so'long as it is moved before the automatic c reversal ,is,to,tal :e,place.

W en u ;.1 it m t ie ers 1 is o tak pla e, the hunt circui efl wi ib los d be- J ve-e t e t st 133, 34 an th if l .i'roltae g therehvbewm fiee iveten 40 size e-solen :eqi @By hel cti of the l e tith 919MB w ll th drawn downcr 'dly' a iewed i Eige. mag reve fhe ai bein s grea -st d e ut-the solenoidwith a quick movement suflicient toIth-row-the latter to itsextreme position. Jfiypthis movement of the solenoid plunger ,the switch bar 15 will be corre Fig. 5 until thebrushQQ bears upon thein- 5 0 sulatillg block ;;1 5. By the movement .of the switchebar ,thercfore }the}energizing circuit of the solenoid}? is automatically opened, the

ientjnertia to carry ,ithGIIlQtO theflextreme open ;p 9\$lt QI1'.fifteI" the circuit of the vcoil lhas-be'e iibroken. :eByctliis same movement of theswitchbarl4the brush 24 willr'becaused to contact avi ththei button l6, while the:brush "-23 willride onto the surface ,ofthe switchbar-andmake contact through the latter iwith thebrush 21. By this rearrangement-of the connections the' field of the motor 32 :becomes energized in the opposite sense to causethe automatic reversal of the linotor. 55 ,Thershunt circuit 39 is now closed between the brushes 21, 23, being open only at the contact 36, 38, so that when the latteris engagedlthe solenoid coil 6 will-be energized to throw=the switch-bar back into the position ,showninihe ,drawing, the shunt 39 being automaticallvopened between the brushes 21, 23, by this shifting movement.

Briefly, therefore, the electrical system .ce iip fi e a s r ce lin havin a ma thereimone winding of which is" connected through a reversing switch, and a pair of shunt circuits each .energizing ga solenoid coil ,for the operationof the ;reversing swit. ,1.ea leno d e g c nt e lahl y sepe-ret iresing Q-QMfland th iswitc including connections by which the solenoid circui i th m ve 7 ar al nately ope e and-i se wby the eve ing movemen :I addition to its function as a means (fen-reiver ng th mo or, th ref re/ ill n r-sing i, switch acts as; aselector to cutout one of;.its 4 Own lenergizingcircuits. and to close i othe -,jenergizing circuit. Although, there is nor- --maly .110. current i used qlby t the [switch-cointrollingqme'chanism, the latter riszalways in readiness to operate by j the -.engagement;0f a

the reversing contacts. c a

1While,in the :foregoing specification I have-described in. considerable detail one specific embodiment of my'j reversing switch, and specific means :for actuating. the reversing contacts which energize t11e-switch,:it Bis to: beunderstoodithatfthis descriptioirand the drawing accompanying thesame isillus- .trartivezonlyand forthe purposeofmaking V clearthe nature and objects;ofztheiinvention and that :I do not rregard hthe invention as limited to :the specific c 1 construction shown .or; described, nor to any :ifeaturezthereof, .except inso far as such limitations are included within 1 the terms of -the following claims .in which .it is my :intention to claim all novelty inherent in my invention as :broadly as is permissible-in :view'of the prior art i lVhat I claim as new anddesiretosecure Letters .iPatent, is 1..-A reverse switch comprising a baseblock, a pairof ialiningisoleno-idcoils-mounted 011 the-base 'block, an electi'ically'conduct 111g solenoid core movable within-the said V 7 t =c0i1s one end of said core being connected solenoidand its,connectingpartsihaving sufliwith one pole of-,a' source of current, a rlswitch-zbar connected with the said core and :reciprocable thereby, contact brushes lc'arried by said base and. bearing constantly against the said switch-bar, connections between some of said contact brushes and said 7 solenoid coils on one i side of the Flatter and :between theother pole and solenoids I on the opposite side; i

A reverse switch comprising a baseblock, apair i of alined solenoid coils mounted on the base-block, an electrically conducting solenoid core movable within the' said 18 coils, one end of said core being connected with one pole of a source of current, a conducting switch-bar connected with said core and reciprocable thereby, contact "brushes carried by' said base and bearing against said switch-bar, connections betweenisome of said contact brushes and said solenoid coils on one side of the latter, and between the other'pole and the opposite side of the solenoids, and means for interrupting said last named connections at predetermined times. v

3. A reverse switch comprising a baseblock, a pair of alined solenoid coils mounted on the base-block, an electrically conducting solenoid core movable within the said coils, one end of said core being connected with one pole of a source of current, a conducting switch-bar connected with said core and reciprocable thereby, contact brushes carried by said base and bearing against said switch-bar, connections between some of said contact brushes and said solenoid coils on one side of the latter and between the other pole and the opposite side of the solenoids, means for interrupting said last named connections at predetermined times, and contact devices actuated by movement of the switch bar for reversing the polarity of a line to be controlled.

HENRY K. SANDELL.

Gopie: of this patent may be obtained for he cents each, by addressing the Commissioner of ratenta, -Wuhington, D. O. 

